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Related Experiment Video

Updated: Jan 29, 2026

Mutagenesis and Functional Selection Protocols for Directed Evolution of Proteins in E. coli

Mutagenesis and Functional Selection Protocols for Directed Evolution of Proteins in E. coli

Published on: March 16, 2011

Functional Evolution of Proteins.

Jonathan Catazaro¹, Adam Caprez², David Swanson³

¹Department of Chemistry, University of Nebraska-Lincoln, Lincoln, Nebraska.

|February 5, 2019

Summary

This summary is machine-generated.

Protein active-site structures evolve sequentially, offering new insights into protein function and substrate specificity. This study analyzed conserved protein features in the RCSB PDB using novel software.

Keywords:

CPASS functional evolution protein active-sites proteins

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Area of Science:

Structural biology
Bioinformatics
Evolutionary biology

Background:

Protein evolution involves gene duplication and mutation, leading to conserved active-site structures.
Conserved protein features allow inference of evolutionary relationships between orthologs and paralogs.

Purpose of the Study:

To perform the first functional clustering and evolutionary analysis of the RCSB Protein Data Bank (PDB) based on active-site structure similarity.
To investigate the sequential evolution of protein active sites and their impact on protein function and substrate specificity.

Main Methods:

Utilized the Comparison of Protein Active-site Structures (CPASS) software and database to score ligand-bound proteins in the RCSB PDB.
Applied principal component analysis to select representative structures and construct a phylogenetic tree based on CPASS comparative scores.

Main Results:

A phylogenetic tree was constructed, revealing a step-wise evolutionary process of protein active sites.
Analysis identified key geometric and amino acid composition changes driving the emergence of new protein functions or altered substrate specificities.

Conclusions:

The study provides a novel framework for understanding protein evolution through active-site structural comparisons.
Findings offer new insights into the mechanisms underlying protein functional diversification and adaptation.